Machine for polishing diamond draw-plates.



E. SCHMIDMER.

MACHINE FOR YOLISHING DIAMOND DRAW PLATES.

APPLIGAMON P11151) 1191191909.

925,233. Patented June 15,1909.

2 SHEETS-SHEET 1.

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5'.) ci only@ s@ E. SCHMIDMER. MACHINE POR POLISHING DIAMOND DRAW PLATES. APPLICATION FILED MAR.. 2,l 1909.

925,233. Patented June 15,1909. 2 SHEETS-SHEET 2.

Witwen p complished by mechanism comprising a reing the use of a new needle.

EDWARD SCHMIDMER, or

NUREMBERG, GERMANY.

MACHINE FOR POLISHlNG DIAMOND DRAW-PLATES.

'To all 'whom it may concern:

Be it known that I, EDWARD SCHMIDMER, asubj ect ofthe Emperor of Germany, residing at Nuremberg, Germany, have invented a new and useful Machine for Polishing Dia-mond Draw-Plates, of which the following is a specification.

This invention relates to the grinding and polishing of diamond draw-plates and has for an object to provide an ap aratus for this purpose which operates e ciently so that a draw-plate is accurately reground and polished at all points. In such devices as heretofore constructed it has been necessary on account of the small hole through the draw-plates, to use a needle for the purpose, which is either operated by hand, or fixed in a suitable form, and with which the plate cooperates and is turned from one point to another durinof the polishing process in order that all sur aces may -be ound. This method has the disadvantage o sooner or later producing avery ragged shaped opening. Furthermore the needle is held at one end and is of such a length that certain portions of the plate farthest from the support are not properly polished owing to the flexibility of the needle and the vibration thereof. In consequence only a small portion of the needle comes into operation and thatpart is therefore soon worn out requirn my present invention the plate is ground and polished evenly and accurately at all portions of the opening and is acciprocating member passing through the draw-plate while the latter at the same time is rotatably driven and at the same time subjected to an oscillating movement, whereby all the angular portions of the draw-plate opening are brought into position to be worked upon and ground by the recipro# eating member.

It further consists of novel details of conl Specification of Letters Patent. Application mea Maren 2, 1909. 'serial No. 480,903.

struction, all as will be hereinafter fully set forth.

For the purpose ofillustrating my invention, I have shown in the accompanying drawings, one form thereof which is at present preferred by me, since the' same has been found in practice to give satisfactory and reliable results, although it is to be understood that the various instrumentalitics of which my invention consists can be variously arranged and organized and that Patented June 15, 1909.

my invention is not limited to the'precise arrangement and organization of these instrumentalities as herein shown and described.

Figure 1 represents a side elevation of a device embodying my invention. Fig. 2 repn resents a plan of the same. Fig. 3 represents a detail of the draw-plate and polishing member.

Similar numerals of vreference indicate corresponding parts in the figures.

Referring to the drawings: 1 designates a pedestal forming a supporting base for my novel polishing mechanism the same having fastened thereon in any suitable manner, a table 2 provided with an extension arm 3 for a purpose to be presently described.

ll designates a shaft mounted for oscillatory movement in a suitable aperture in the table 2 `and carrying thereon a plate 5', it being of course understood that a suitable hub (i and collar 7 are provided to prevent vertical displacement of the aforesaid shaft. ln the present instance thev plate 5 carries thereon an angle plate 8 having a conical hollow bearing 9 integral therewith, the same forming a bearing surface adapted tov receive a. member 10, a portion of which co operates with the conical bearing 9 and has an exterior pulley 11 formed thereon, while the remaining portion thereof thereon a` holder 12 for securing 13 inposition;

14 designates a belt adapted to encircle the pulley 11 to furnish means to rotate the same, as desired. ln order to maintain the pulley 11 and member 10 in correct position at all times while rotating about the conical bearing t), a forked bracket 15 is suitably secured to the plate 5 in position to prevent displacement of the pulley7 11. 1G designates a slotted extension on the plate, 'the same being adapted for engagement with a lug 17 suitably mounted on a gear 18, which latter is rotatably carried on an extended portion of the table Q. It will thus be apparent that as the gear 1S is rotated the plate 5 will receive an oscillating movement with the shaft 4 and thus produce a shifting of the diamond plate l?) for the `proper grinding operation. it being noted. however, that the movement of the diamond plate is a very limited one since in the preferred construction the point at which the diamond plates are. located is in Asubstantial alincnient with the center of the axis through the shaft 4.

the diamond has mounted 19 designates a ,bearing bracket secured to the arin 3 adapted to carry for slidinv movement thereon a rod 20, one end ofD which terminates in a jaw 21, cooperating with which is a second jaw 22 suitably pivotcd iii the present instance, to a U-sliaped ineinber 23, wherebj7 a gripping device is formed adapted to hold one end of the polishing wire In order to set the jaws 21 and 22 a screw 25 or like device passes in the preferred form'through the long arm of pivoted jaw 22 and into the rod 20.

26 designates a hea-d fixedly mounted on the rod and having secured thereto, a frame 27, one side of which passes over the table 2 and through a slot 28 formed in the plate 8l and terminating in a wire tension same being driven by device consisting, in the Apresent instance, of a guide arm 29 fixedly mounted on frame 27 and provided with a guide 30 thereon through which the wire 24 passes and is secured to a binding post 3 1 carried, preferably by a spring arm 32 mounted on the frame 27 and normally tending to maintain the. wire 24'taut. t

33 designates a stop device mounted o'n the frame 27 and so positioned as to limit in one direction the movement of the frame 27 and wire 24. In the reverse direction the movement and control of the frame 27 is preferably had by means of a traveler34 having an aperturcd lug 36 thereon coperating with the rod 20 and the opposite end of said traveler having threaded hubs 36 carried on a feed screw 37 suitably mounted in bearings 38and 39 rrespectively of the arm 3 and the table 2.

In order to vary the relation between the traveler 34 and the head 26 so that'the enga ement of these parts will take place at dierent times in order to( bring into operation a different working portion of the polishing wire 24, I preferably mount on the feed screw 37 a driven pulley 40 with which a rope drive 4l or the like coperates, the a pulley 42 mounted on shaft 43, the latter being suitably carried in a bracket 44 on the pedestal 1 while the handle crank 45 is provided to produce proper movement of the parts. It will be apparent as the crank 45 is turned to produce rotation of the feed screw that the traveler 34 will be moved theiealong in one direction or the other and thereupon shift the position of the head 26 to bring another portion of the polishing wire 24 into ."'operat'ive engagement with the draw-plates'.

In order to properly guide the frame 27 Vin its reciprocating movement an l,arm 46 is suitably mounted on the table 2 and carries at its upper end a. guide finger 47 to maintain the frame in correct alinenient, while at its lower end a sheave 48 is rotatably mounted on an adjustable bearing block 49 and in such a position as to support at all times the the head 26 is engaged on one side only by 7 the traveler 34 that some means must be provided for the return movement of the frame 27 and in the present instance I have provided a counterweight operating means consisting, as here secured to the head 26 and carrying on each end thereof a wire rope or'equivalent device 51 passing over a pulley 52 suitablymount- ,ed, as here shown. on a bearing bracket 19,

carrying ya t.

the ends of said wires each weight 53, which is sufficient to the Weight of the adjuncts.

In the present instance in order to drive the gear 18 to produce an oscillating movement of the pulley 11 I provide a sha-ft54 rotatably mounted in brackets 55 secured to an extension lof the table 2, the 54 carrying thereon a worm gear 56 adapted for engagement with the gear 18 whereby as the shaft 54 isrotated the gear 18 Willcbc correspondingly driven.

In order to transmit motion from the shaft 54 tothe screw shaft-37 to roduee movement of the traveler, I preferably employ a friction drive mechanism consisting in the present instance of a friction Wheel overbalance moving parts 27 and their 57 mounted on theshaft 37 and adapted t0,...

be held in contact ywith a ysimilar riction wheel 58 secured to shaft 54 b spring 59 cooperating with a aring 39.

In the present instance, the shaft 54 has mounted thereon, a pair of-pulleys 60 and 61 in order that different speeds of movement of the traveler 34 may be accomplished 105 and any suitable means such as a plate or the like may be provided to operate the said pulleys.

The operation `of the device will now be apparent since as soon as is properly adjusted by manipulation of handle crank 45 to bring the traveler 34y into the desired engagement with head 26 the shaft 54 is thrown into operation and the device ment. The rotation ofcshaft 54 causes a` simultaneous operation of the gear wheel 18 and friction Wheel 57, the former throurh the crank connection 17 producing an oseil ation of the drawa rotation o screw vshaft of screw shaft 37 sufficient distance polishing wire 24 37. The rotationy advances the traveler 34 a to draw a portion of the through the draw-plate 13 whereupon a reverse movement of the mech- 125 anisin takes place and the parts return lto normal position.

It will of course, be understood that the member 10 during its oscillation is receiving t movement' through the l?? a suitable rotative shown, of a bar 50 lixedly 7,

said shaft f f means of a the polishing wire is ready for a polishing movelate member l10 and the latter 120 driving pulley 11 and therefore, it will be readily understood that the drauhplates are subjected an even contact atv all points With the polishing Wire and are accurately ground and polished.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is l 1. In a device of the character described, a table, a member -mounted thereon adapted to support diamond draw-plates, means to oscillate said member and polishing means for said draw-plates. l

2. In a device of the characterdescribed, a table, a member rotatably mounted thereon and adapted to support diamond drawplates, means to oscilla-te said member and polishingr means for said draw-plates.

In a device of the character described, a table, a member mounted thereon adapted to support diamond draw-plates, a reciprocable device for polishing said draw-plates and means to oscillate and rotate said member during reciprocation of said polishing device. c

4. In a device of the character described, a table, a member rotatably mounted thereon adapted to support diamond draw-plates, means to oscillate said member, a polishing device for said draw-plates and means to reciprocate said polishing device during movements of said member.

a table, a bracket mounted thereon for` I oscillatory movement, a member rotatively carried by said bracket and adapted to support diamond i draw-plates the said draw plates being positioned in substantial aline- 'ment With the axis of oscillation of said bracket, a polishing wire for said draw plates7 means to reciprocate saidv Wire, and means to maintain said wire under tension. 7. In a device of the character described, a table, a bracket mounted thereon for oscillator movement, a member rotatively carried y said bracket and adapted to support diamond draw-plates the said draw-plates being positioned in substantial alinement with the axis of oscillation of said bracket, a polishing Wire for said draw-plates, means to reciprocate said Wire, and means to adjust the Working position of said Wire. EDWARD SCHMIDMER. Witnesses:

OSCAR BooK, ELISABETH HELLMUTH. 

